| Acronym | Definition |
|---|
| KA | Knowledge Area |
| KA | Kick Ass |
| KA | Kamov (Russian aircraft designer) |
| KA | Kappa Alpha |
| KA | Kilmarnock (postcode, United Kingdom) |
| KA | Keine Ahnung (German: No Idea) |
| KA | Kahr Arms (Orangetown, NY) |
| KA | Key Account |
| KA | Thousand Years Ago |
| KA | Keep Alive |
| KA | Knowledge Acquisition |
| KA | Kool Aid |
| KA | Dragonair (Hong Kong airline company) |
| KA | Keyed Alike (locksmithing) |
| KA | Knee Airbag (automobiles) |
| KA | Kenya Airways |
| KA | Kainate |
| KA | Karlsruhe, Germany (automobilie license plate) |
| KA | Ketoacid |
| KA | Kainic Acid |
| KA | Keine Angabe (German) |
| KA | Killer App |
| KA | Kenmore Air |
| KA | Key Area |
| KA | Key Activities |
| KA | Keratoacanthoma |
| KA | Acid Dissociation Constant |
| KA | King's Army (historic reenactment group) |
| KA | Ionization Constant |
| KA | Karlovac, Croatia (license plate) |
| KA | Knowledge Architecture |
| KA | Kids to Adults (former ESRB game rating) |
| KA | Kristina Abernathy (Weather Channel personality) |
| KA | Kissinger Associates |
| KA | Kilo-Amperes |
| KA | Known Associate (law enforcement) |
| KA | Knife Arena (gaming) |
| KA | Kill Assessment |
| KA | Kelvinside Academy (Glasgow, Scotland private school) |
| KA | Katholieke Actie (Dutch) |
| KA | Kaiserslautern American |
| KA | Kalos Agon (martial arts) |
| KA | Kepler Associates (UK) |
| KA | Acid Constant |
| KA | Ketamine and Atropine |
| KA | Knight Ascension (Knight Online game expansion) |
| KA | Kirov Airship |
| KA | Karma Aquatics (Virginia Beach, VA) |
| KA | Kaiser Engineering Inc |